Question

Pretty straightforward; I’ve read through the docs but perhaps I’m just a tad confused by the explanation.

class Test{
    public static $var = 'world';
}

echo "hello {Test::$var}"; // only parses $var in current scope, which is empty

Is there any way to achieve the desired functionality here? I’m starting to guess no, as I’ve tried a number of permutations with no success.

Clarification: I’m trying to achieve this with PHP’s variable parsing, not concatenation. Obviously I’ll resort to concatenation if the desired method is not possible, though I’m hoping it is.

Answer 1

Variable parsing in PHPs double quoted strings only works for “variable expressions“. And these must always start with the byte sequence {$. Your reference to a static identifier however starts with {T hencewhy PHP parses towards the next $ in your double quotes and ignores Test::

You need to utilize some cheat codes there. Either use a NOP wrapper function:

$html = "htmlentities";
print "Hello {$html(Test::$var)}";

Or pre-define the class name as variable:

$Test = "Test";
print "Hello {$Test::$var}";

I’m afraid there’s no native way to accomplish this otherwise.